1. Talk in 4 parts Basic principles of the Semantic Web
Current state & results of the Semantic Web
New challenges of the Semantic Web
Very large-scale reasoning

2. Semantic Web Intro in 6 slides & a movie
Frank van Harmelen

3. The Current Web of text and pictures
The Future Web of Data
and another
web page
about
Frank
This page
is about
the Vrije
Uniersitei
a web page
in English
about
Frank
And this
page is
about
LarKC
And this
page is
about
Stefano ? ? ?
linked web-pages,
written by people,
written for people,
used only by people... ? ?
linked data,
usable by computers!
useful for people!
Many of these pages
already come from data,
that is usable by computers!
But we can’t link the data....

5. P1. Give all things a name

6. P2. Relations form a graph between things

7. P3. The names are addresses on the Web
[<x> IsOfType <T>] x
different
owners & locations T
<analgesic>

8. P1+P2+P3 = Giant Global Graph

9. P4. explicit & formal semantics
assign types to things
assign types to relations
organise types in a hierarchy
empose constraints on possible interpretations

10. Examples of “semantics”
married-to
Frank
Lynda
married-to
Hazel
Frank is male
married-to relates males to females
married-to relates 1 male to 1 female
Lynda = Hazel
lowerbound
upperbound
Semantics = predictable inference